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题名: Parity, charge conjugation, and SU(3) constraints on threshold enhancement in J/psi decays into gamma p(p)over-bar and Kp(Lambda)over-bar
作者: He, XG ;  Li, XQ ;  Ma, JP
刊名: PHYSICAL REVIEW D
出版日期: 2005
卷号: 71, 期号:1, 页码:-
学科分类: Physics
通讯作者: He, XG , Nankai Univ, Dept Phys, Tianjin 300071, Peoples R China.
部门归属: Nankai Univ, Dept Phys, Tianjin 300071, Peoples R China; Acad Sinica, Inst Theoret Phys, Beijing 100080, Peoples R China; Peking Univ, Dept Phys, Beijing, Peoples R China
英文摘要: We study the threshold enhancement effects of baryon-antibaryon systems in J/psi decays at BES using parity P, charge conjugation C, and flavor SU(3) symmetries. The P and C symmetries restrict the p (p) over bar in J/psi-->gammap (p) over bar to be in a state with C=+1, while the p (p) over bar in J/psi-->pi(0)p (p) over bar to be with C=-1. Combining the C and P symmetries with flavor SU(3) symmetry, i.e., the CPS symmetry, we find that the Lambda(p) over bar system cannot be in 0(+) and 0(-) states in J/psi-->K(+)Lambda(p) over bar. We provide a consistent explanation of observation and nonobservation of near threshold enhancements in J/psi-->K(+)Lambda(p) over bar and J/psi-->pi(0)p (p) over bar, respectively. We also find that near baryon pair threshold enhancement can happen in several channels for J/psi decays and can be several times larger than that observed in J/psi-->K(+)Lambda(p) over bar in some channels.
收录类别: SCI
原文出处: 查看原文
WOS记录号: WOS:000226702300050
Citation statistics: 
内容类型: 期刊论文
URI标识: http://ir.itp.ac.cn/handle/311006/13921
Appears in Collections:理论物理所1978-2010年知识产出_期刊论文

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Recommended Citation:
He, XG,Li, XQ,Ma, JP. Parity, charge conjugation, and SU(3) constraints on threshold enhancement in J/psi decays into gamma p(p)over-bar and Kp(Lambda)over-bar[J]. PHYSICAL REVIEW D,2005,71(1):-.
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